JP5363453B2 - Bag body having chuck with slider to which unauthorized opening prevention function is added, and manufacturing method thereof - Google Patents

Description

  The present invention relates to a bag body having a chuck with a slider obtained by adding an unauthorized opening prevention function to a bag body having a chuck with a slider. Here, a bag body having a plastic chuck with a slider is easy to open and resealable while maintaining hermeticity, and is widely used in packaging containers for food, medicine, electronic parts and the like.

  Furthermore, this invention relates to the manufacturing method of the bag body which has a chuck | zipper with a slider which added such an unauthorized opening prevention function.

  As described above, as a packaging material for various articles such as foods, medicines, and electronic parts, bags having a plastic chuck are often used. In particular, bags having a plastic chuck with a slider are frequently used as packaging materials that can be easily opened and resealed.

  With the diversification of the items to be packaged, such a bag body is required to have higher airtightness.

  Moreover, in such a bag body, if it is opened for an unauthorized purpose or error after hermetically wrapping, inconveniences such as foreign matter mixing in and quality of the contents being impaired occur. For this reason, it is desired to provide a bag body having a chuck with a slider with a function capable of confirming that the bag has been opened after hermetic packaging.

  Conventionally, various bag bodies including a plastic chuck having the functions described above have been proposed. Among them, the following bags are known as having great relevance to the present invention.

  In Patent Document 1 (Japanese Utility Model Publication No. 62-90332), in a certificate bag having an opening groove on the lower side of a chuck with a slider on the head, an opening plate is provided outside the chuck except for the slider. Seal the seal paper between the cover plate and the opening groove of the cover bag, and open the cover bag so that it can be easily confirmed that the certificate has been used for other purposes. Is disclosed.

  In the custody bag disclosed in Patent Document 1, since the bag cannot be sealed by the opening groove formed in the bag, the bag cannot be applied to a bag that needs to be sealed. In addition, since the work of covering the opening covering plate on the bag or sealing the sealing paper is performed manually, when the storage bag disclosed in Patent Document 1 is used for a normal packaging bag, productivity is poor. .

  Patent Document 2 (WO2005 / 048763A1) discloses a bag body having a slider with a slider and a chuck with a tamper-resistant function in which an upper portion of the bag body is covered with a cover film and a function for preventing unauthorized opening is shown in FIGS. It is disclosed as a technology.

  In the bag having a chuck with a slider to which an unauthorized opening prevention function disclosed in Patent Document 2 is added as a prior art, the slider can be moved inside the cover film. For this reason, when the slider is moved by mischief, the inside and outside of the cover film communicate with each other through the perforation of the cover film, and the sealing performance may be impaired. However, there is a problem that it is difficult to determine whether such a mischief has been performed, and it is difficult to determine the occurrence of an abnormal situation in which the sealing performance is impaired. Furthermore, the bag body having the slider-equipped chuck disclosed in Patent Document 2 cannot be mechanically continuously produced, and there is a problem that industrial productivity is inferior.

  In Patent Document 3 (Japanese Patent Publication No. 2002-543862), a bag body having a chuck with a slider to which a tamper-resistant function of attaching an adhesive label is attached to a chuck portion other than a slider at the upper part of the bag body is shown in FIG. 4b.

  The bag body having the slider-attached chuck added with the unauthorized opening prevention function disclosed in Patent Document 3 cannot be continuously produced mechanically, and there is a problem that industrial productivity is inferior.

  In addition, the bag body of Patent Document 3 has a drawback in that when a label is applied only to a part of the chuck in the longitudinal direction, unauthorized opening (opening by hand without moving the slider) cannot be detected at a portion where the label is not applied. There is.

Japanese Utility Model Publication No. 62-90332 WO2005 / 048763A1 publication Japanese translation of PCT publication No. 2002-543862

  An object of this invention is to provide the bag body which has a chuck | zipper with a slider which added the unauthorized opening prevention function which can eliminate the problem and fault accompanying the prior art mentioned above.

  More specifically, an object of the present invention is to provide a bag body having a chuck with a slider to which a tamper-resistant opening prevention function is added, which can keep the bag sealed, can be mechanically produced continuously, and has good productivity. It is another object of the present invention to provide a bag having a slider-attached chuck to which an unauthorized opening preventing function is added so that the sealing performance is not impaired even when the slider is moved by mischief.

  Furthermore, this invention aims at providing the manufacturing method of the bag body which has a chuck | zipper with a slider which added the above unauthorized opening prevention functions.

  In the present invention, in a bag in which both ends of two plastic films are fused, and having a plastic chuck with a slider at the opening of the bag, the slider in a state where the plastic chuck is closed and A cover film covers the upper end portion of the plastic chuck excluding the fused portion located on the opposite side of the slider to the slider, and the two lower end portions of the cover film are engaged with the plastic chuck. The lower end of the cover film extends over the entire width of the bag, and the lower end of the cover film forms the bag. The plastic film and the flange of the plastic chuck, the plastic film, The lower end of the cover film, and tripartite of the flange portion by a bag having a slider with plastic zipper by adding a tamper evident, characterized in that it is fused, to achieve the above object.

  In this bag body, in order to prevent the slider from being moved by mischief, the distance between the slider when the plastic chuck is closed and the cover film side end adjacent to the slider is 5 mm or less. Preferably, and / or the top of the cover film is lower than the top of the slider when the plastic chuck is closed.

  Further, in order to facilitate the opening of the bag body of the present invention, the cover film is provided with a perforation or weak body portion for separation extending in the width direction of the bag body, and / or the plastic chuck is closed. It is preferable that a knob is provided on the cover film in the vicinity of the fused portion of the bag located on the opposite side to the slider in the closed state.

The present invention also provides:
Supplying two continuous plastic films forming a bag;
Supplying to the two plastic films a continuous cover film film folded in half with a continuous plastic chuck and a slider mounting opening;
Sending the cover film film folded in half so as to straddle the plastic chuck;
A step of stacking the two plastic films, the plastic chuck and the cover film and fusing them in the supply direction;
A process of forming a fused part for both ends of a bag by fusing two fused plastic films, a plastic chuck and a film for a cover film at a width interval of the bag perpendicular to the supply direction. ,
Including the step of attaching a slider to the plastic chuck through the opening for attaching the slider of the film for the cover film, and the step of cutting the fused portion for both ends of the bag perpendicular to the supply direction. The above object is achieved by a method for manufacturing a bag having a plastic chuck with a slider to which an opening prevention function is added.

  In the present invention, during the supply of the cover film, a notch serving as an opening for attaching the slider and an opening for the fused portion at both ends of the bag may be formed, or the opening for attaching the slider Alternatively, a cover film film in which a notch serving as an opening for both ends of the bag is formed may be supplied.

  Further, in the present invention, when the two plastic films, the plastic chuck, and the cover film film are fused, they are fused with a heat shielding plate inserted between a pair of flanges of the plastic chuck. Thus, it is preferable that the flanges are not fused.

  According to the present invention, the problems of the conventional tamper-evident prevention method as described above are solved, and it can be seen that when the plastic chuck is tampered with or wrongly opened, it is immediately opened from the appearance. That is, if the slider is moved in an attempt to open it illegally, the cover film is damaged, so that it can be seen from the appearance that the slider is immediately moved in the opening direction.

  Furthermore, according to the present invention, there is provided a plastic chuck bag body with a slider that is suitable for long-term storage and can prevent unauthorized opening by imparting hermeticity to the plastic chuck itself.

  In addition, according to the present invention, there is provided a method of manufacturing a chuck bag body with a slider to which an unauthorized opening preventing function with excellent productivity is added. That is, in the bag manufacturing method according to the present invention, since at least one lower end of the cover film extends over the entire width of the bag, a continuous film is used as the cover film film itself. It can be continuously supplied as a cover film for a cover film while serving as a transport means. After the end of the role of the conveying means, the continuous cover film cover film is cut together with the plastic film and the plastic chuck fused together at the longitudinal heat seal portion at intervals of the width of the bag body to form the bag body.

  Therefore, according to the present invention, there are provided a bag body having a plastic chuck with a slider to which an unauthorized opening preventing function that can be continuously produced mechanically and has good productivity is added, and a manufacturing method thereof.

  In the bag according to the present invention, the cover film covers the upper end portion of the plastic chuck except for the slider in the state where the plastic chuck is closed and the fused portion located on the opposite side of the slider of the bag body. Yes.

  When the perforation for detachment or the weak body part is provided on the cover film, the cover film can be easily peeled off. Further, even when the slider is moved for unauthorized opening, the perforation or weak part for cutting off the cover film is torn, so that it can be judged directly from the appearance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings illustrating embodiments of the present invention. In the accompanying drawings,
FIG. 1 is a perspective view of an embodiment of a bag having a plastic chuck with a slider to which an unauthorized opening prevention function according to the present invention is added. FIG. 2 is a perspective view showing a state in which the contents are stored in the bag body without fusing one plastic film to the plastic chuck in the bag body of the present invention. 3A is a perspective view illustrating the shape of the cover film illustrated in FIG. 1, and FIG. 3B is a perspective view illustrating the shape of the cover film illustrated in FIG. 4A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 4B is a cross-sectional view taken along the line CC in FIG. FIG. 5A is a cross-sectional view taken along the line B-B in a state where the lower end of the bag body of FIG. 1 is opened, and the heat seal portion at the lower end corresponding to FIG. FIG.5 (b) is sectional drawing in the middle of manufacture of the bag body which has the plastic chuck with a slider which added the unauthorized opening prevention function based on this invention which open | released the lower end part of the bag body. FIG. 6 is a cross-sectional view of the width of the bag body perpendicular to the supply direction when two fused plastic films, the plastic chuck and the cover film film are used in the method of manufacturing a bag body having a plastic chuck with a slider according to the present invention. It is a perspective view which shows the process of forming the melt | fusion part for both ends of a bag body by fuse | melting at intervals. FIG. 7 is a perspective view showing a method for producing a bag body having a plastic chuck with a slider according to the present invention using an apparatus having the function of an automatic bag making machine.

  FIG. 1 shows a perspective view of an embodiment of the present invention. In FIG. 1, the bag 1 is formed by heat-sealing 7 and 8 at both left and right ends and bottoms of two plastic films 2 and 3. A tape-shaped plastic chuck 5 is provided in the opening at the upper end of the bag 1, and a slider 6 is attached to the plastic chuck 5.

  The tape-shaped plastic chuck 5 is composed of a pair of tapes and has male and female engaging portions that engage with the flange portions 51 and 52, respectively (see FIGS. 4 and 5).

  The slider 6 slides along the plastic chuck 5 to open and close the engaging portion of the plastic chuck 5. That is, when the slider 6 is located at one end 71 (closed end) of the plastic chuck 5 (right side in FIG. 1), the engaging portion of the plastic chuck 5 is fully closed, and the other (left side in FIG. 1). When in the end 711 (open end), the engaging portion is fully opened.

  The cover film 4 is bent in an inverted U shape and covers the top surface of the top of the engaging portion of the plastic chuck 5 across the upper end of the plastic chuck 5. More specifically, the cover film 4 has the upper end of the plastic chuck 5 excluding the slider 6 in the state where the plastic chuck 5 is closed (closed end) and the fused portion located on the opposite side (open end) of the slider 6 of the bag body. It covers the part.

  Accordingly, the end 31 on the closed end side of the upper surface of the cover film 4 is positioned closer to the open end 711 than the end 61 on the open end 711 side of the slider 6 at the closed end, and the open end on the upper surface of the cover film 4 The end portion 32 on the 711 side is located closer to the closed end 71 than the opening end 711.

  The two lower end portions 41 and 42 of the cover film 4 reach the flange portions 51 and 52 below the engaging portion of the plastic chuck 5, as shown in FIGS. 4 (a) and 5 (a). And at least one lower end 41 or 42 of the two lower ends 41 and 42 of the cover film 4 extends over the entire width of the bag 1 (between the heat seals 7 and 7 at both ends) as shown in FIG. (Length is H).

  At least one of the two lower end portions 41 and 42 of the cover film 4 includes an upper end of the plastic films 2 and 3 constituting the bag 1 and a flange portion 51 of the plastic chuck 5 as shown in FIG. As shown in FIG. 5A, the three members of the plastic films 2 and 3, the lower end portions 41 and 42 of the cover film 4, and the flange portions 51 and 52 of the plastic chuck 5 are connected to the slider 6. It is fused (heat seal 11) at a position below (the contents side) from the lower end of the sheet.

  In the embodiment of FIG. 5A, the plastic films 2 and 3, the lower end portions 41 and 42 of the cover film 4, and the flange portions 51 and 52 of the plastic chuck 5 are stacked in this order from the outside. On the other hand, in the embodiment shown in FIG. 5B, the lower end portions 41 and 42 of the cover film 4 are the two flange portions 51 and 52 of the overlapped plastic chuck 5 and the two sheets constituting the bag 1. It is different from the embodiment of FIG. 5A because it is located outside the upper ends of the films 2 and 3.

  It is desirable that the lower end portions 41 and 42 of the cover film 4 are located at substantially the same positions as the lower end portions of the flange portions 51 and 52 of the plastic chuck 5.

  The interval between the slider 6 and the cover film 4 side end 31 adjacent to the slider 6 in a state where the plastic chuck 5 is closed is set to 5 mm or less. Further, the top of the inverted U-shape of the cover film 4 is set lower than the top of the slider 6 when the plastic chuck 5 is closed.

  As shown in FIG. 1, the upper surface 34 of the cover film between the end 72 of the bag on the closed end side and the end 31 on the closed end side of the cover film 4, and the end 712 of the bag on the open end side and the cover film 4 The upper surface 35 of the cover film between the end portions 33 on the opening end side is preferably positioned below the lower end portion of the slider 6 and substantially parallel to the plastic chuck 5.

  The shape of the cover film 4 shown in FIG. 1 is shown in FIG. As shown to Fig.3 (a), the cover film 4 folded in half by the reverse U-shaped cross section is left-right symmetric in the cross-sectional state. However, the shape of the cover film 4 is such that at least one lower end 41 of the two lower ends 41 and 42 extends over the entire width of the bag 1 (between the heat seals 7 and 7 at both ends) (length is H). As long as it exists, other shapes, for example, a shape as shown in FIG.

  In addition, on the upper surface or the side surface of the cover film 4, a perforation for detachment extending from the end 31 on the closed end side to the end 33 on the opening end side, or a breakable weak body portion 9 extending in the width direction of the bag body. It is desirable to be provided. The number of the perforating lines for detachment or the weak body parts 9 that can be broken is preferably about 1 to 3, and is preferably provided in parallel with the plastic chuck 5.

  Further, in the embodiment shown in FIGS. 3A and 3B, the cover film (in the vicinity of the fusion portion 7 of the bag body 1 located on the side opposite to the slider 6 in a state where the plastic chuck 5 is closed) ( That is, the knob 10 is provided at the end 33) on the opening end side of the cover film 4. When opening the bag body 1, by picking up the knob 10, the breakable weak body portion 9 such as a perforation can be broken and the cover film 4 can be peeled off.

Further, by sliding the slider 6 in the direction from the closed end 71 to the open end 711, the breakable weak body portion 9 such as a perforation is broken and the cover film 4 is peeled off, so that the bag body is opened. It is clearly shown.
When the cover film 4 is peeled off before the slider 6 is moved in regular opening, it is preferable to provide a knob 10. However, since the cover film 4 can be peeled off also by moving the slider 6, if the slider 6 is moved without stripping the cover film 4 in advance, the cover film 4 is opened from the end 31 on the closed end side. The side end portion 33 is peeled off by the sliding movement of the slider 6. In this case, the knob 10 can be omitted.
When the cover film 4 peeled off due to a long distance from the end 31 on the closed end side of the cover film 4 to the end 33 on the open side is entangled with the slider 6, the end 31 on the closed end side opens to the opening side. One or more slits 10 ′ (see FIG. 1) made of a perforation for cutting or a weak body portion are provided between the end portions 33, and the portion to be peeled off from the cover film 4 can be appropriately divided. As shown in FIG. 1, the slit 10 ′ crosses at least the lower perforation or breakable weak part 9 from the inverted U-shaped top of the cover film 4, and the upper surface 34, It is preferable to reach almost the same position as 35.
Thus, even if the plastic chuck is partially opened by the slider 6, the cover film 4 is peeled off, so that it is clearly shown that the bag is opened.

  By the way, since the cover film 4 has a structure with an open end, the plastic chuck 5 portion may not be sealed with the cover film 4 alone. As a countermeasure against this, it is preferable to ensure the sealing of the plastic chuck 5 part as described in (a) and (b) below.

  A. The upper end portions of the plastic films 2 and 3 of the bag body 1 or the plastic chuck 5 of the bag 1 where the slider 6 is stopped when the plastic chuck 5 is closed are heat-sealed so that the slider 6 is temporarily moved from the stop position. Even if it moves slightly, the plastic chuck 5 part is guaranteed to be sealed.

  B. As disclosed in Patent Document 2 (WO2005 / 048763A1) by the present inventor, an easily peelable plastic layer is formed on the top of the female claw forming the engaging portion or on the surface of the flange of the male claw facing the top. By using the plastic chuck 5 provided beforehand with the present invention, the sealing of the plastic chuck 5 portion is ensured.

  Next, the manufacturing method of the Example of the bag body which has the plastic chuck with a slider which added the unauthorized opening prevention function shown in FIG. 1 of this invention with reference to FIG. 7 is demonstrated.

  Two tape-shaped films 2 and 3 constituting the bag 1 are wound around reels 21 and 36, respectively. Further, a tape-shaped cover film film 4 is prepared by winding it on a reel 43. The tape-like cover film film 4 is provided with a breakable weak portion 9 such as a perforation. The tape-shaped plastic chuck 5 is prepared by winding it on a reel 53.

  The two tape-like films 2 and 3 are intermittently drawn out for a length H from the reels 21 and 36 by draw rolls 141 and 142 driven intermittently. The tape-shaped plastic chuck 5 is pulled out from the reel 53. Furthermore, since the tape-like cover film film 4 is bonded to a plastic film as will be described later, the tape-like cover film film 4 is intermittently drawn from the reel 43 by a length H in synchronism with the two tape-like films 2 and 3. Then, it is half-folded (folded in half) by the half-folding machine 44.

  When the drawing rolls 141 and 142 driven intermittently are stopped, the punching presses 44 and 45 are lifted and lowered to form the slider mounting openings (notches 31 to 35) in the cover film film 4 which is half-folded (folded in half). . Alternatively, the slider mounting openings (notches 31 to 35) may be formed in advance by the punching presses 44 and 45 and then half-folded by the half-folding machine 44.

  The cover film film 4 folded in two so as to straddle the tape-shaped plastic chuck 5 is fed, and the two plastic films 2 and 3, the tape-shaped plastic chuck 5 and the cover film film 4 are stacked and intermittently driven. When the drawn rolls 141 and 142 are stopped, the films 2 and 3 are fused in the supply direction (lateral heat seal 11) by the transverse heat sealers 111 and 112 arranged in the feeding direction.

  When the two plastic films 2 and 3, the plastic chuck 5 and the cover film film 4 are fused, a heat shielding plate such as an iron plate (not shown) is interposed between the pair of flanges 51 and 52 of the plastic chuck 5. ) Is preferably inserted in the inserted state. Thereby, while preventing a pair of flanges 51 and 52 of the plastic chuck 5 from being fused, the plastic film 2, the flange portion 51 of the plastic chuck 5 and the lower end portion 41 of the cover film film 4, the plastic film 3, The flange portion 52 of the plastic chuck 5 and the lower end portion 42 of the cover film film 4 can be fused.

  In addition, the vertical heat sealing machine 72 arranged perpendicular to the feeding direction of the films 2 and 3 moves up and down when the draw rolls 141 and 142 driven intermittently are stopped, and the width of the bag body 1 perpendicular to the feeding direction. The melted portion 7 for both ends of the bag 1 is formed by fusing at a predetermined position of the cutout portion of the film 4 for the cover film with a gap (vertical heat seal 7).

  A slider mounting machine 62 is installed beside the transport path of the films 2 and 3 on the downstream side of the vertical heat sealing machine 72. When the drawing rolls 141 and 142 driven intermittently are stopped, the slider mounting machine 62 advances and retreats in the direction perpendicular to the transport path of the films 2 and 3 to open the slider mounting openings (notches 31 to 35) of the cover film 5. ) To attach the slider 6 to the closed end of the bag 1 of the plastic chuck 5.

  Further, a guillotine cutter 13 is installed downstream of the slider mounting machine 62. When the draw rolls 141 and 142 that are intermittently driven are stopped, the guillotine cutter 13 is raised and lowered, and as shown in FIG. 6, the bag body perpendicular to the supply direction is cut by the center line FF of the vertical heat seal 7. 1 is fused.

  Thus, the heat seal 7 is provided at both ends, and as shown in FIG. 5 (a), the bag body 1 having the plastic chuck with the slider 6 to which an unauthorized opening preventing function having an open bottom is added is obtained. Since all these processes can be processed by a bag making machine, the productivity is extremely excellent and the production cost is low.

  Next, embodiments of two methods for filling the contents into the bag body 1 having the slider-attached chuck to which the unauthorized opening prevention function according to the present invention is added will be described.

  In the embodiment shown in FIGS. 5A and 5B, the lower portion of the bag body 1 is opened, the bag body 1 is placed sideways, or the bag body 1 is turned upside down. ) And the lower portion of the bag body 1 in FIG. Thereafter, the lower portion of the bag 1 is sealed by heat sealing 8 as indicated by the phantom line in FIG.

  On the other hand, in the embodiment shown in FIGS. 2 and 4B (C-C cross-sectional view in FIG. 2), one lower end portion 42 of the cover film film 4, the flange portion 52 of the plastic chuck 5, and the bag body 1 are used. Only the upper end portion of the film 2 constituting the film is superposed and heat-sealed 11. On the other hand, the upper end portion of the other film 3 is separated from the lower end portion 41 of the cover film film and the flange portion 51 of the plastic chuck 5 to form an opening for filling the contents. The contents are filled into the bag body 1 in the direction of the arrow shown in FIG.

  After that, the upper end portion of the film 3 that has been separated is overlapped with the lower end portion 41 of the cover film film and the flange portion 51 of the plastic chuck 5, and sealed by heat sealing 11.

  In the embodiment shown in FIG. 4 (b), the films 2 and 3 constituting the bag body 1 are heat sealed at the bottom of the bag body 1. However, the bottom of the bag 1 may be folded using one film constituting the bag body 1.

  In the heat seal 11 described above, a heat shielding plate (not shown) such as an iron plate is inserted between the pair of flanges 51 and 52 of the plastic chuck 5 to prevent the pair of flanges 51 and 52 from being fused together. When trying to heat seal the upper end of the film 3, the bag 1 is closed and the heat shield plate cannot be taken out.

  Instead of inserting a heat shielding plate, the following measures a, b, or c are taken, and the film 3, the lower end portion 41 of the cover film film, and the flange portion 51 of the plastic chuck 5 are fused, but the plastic chuck 5 The pair of flanges 51 and 52 can be prevented from being fused.

  a, the film 3, the lower end portion 41 of the cover film, and the flange portion 51 of the plastic chuck 5 are fused, but the strict heat sealing conditions (heat Select seal temperature, time, etc.

  b, a special material is selected for the flanges 51 and 52 of the plastic chuck 5 as proposed by the present inventor in Japanese Patent Laid-Open No. 2002-337892.

  c, or, as proposed by the present inventor in the publication, minute irregularities are formed on the surfaces of the flanges 51 and 52.

DESCRIPTION OF SYMBOLS 1 Bag body 2, 3 Plastic film 4 Cover film 31 The edge part 32 of the closed end side of a cover film The opening edge end part 33 of a cover film The edge part 34 of the opening end side of a cover film The bag edge part and cover film of a closed end side The upper surface 35 of the cover film between the ends on the closed end side of the cover The upper surface 41, 42 of the cover film between the bag end portion on the opening end side and the end portion on the opening end side of the cover film 5 The lower end portion 5 of the cover film 51, 52 Plastic chuck flange 71 Plastic chuck closed end 711 Plastic chuck open end 6 Slider 61 Slider open end 7 Heat seal at both ends of bag 8 Heat seal at bottom of bag 9 Perforated or breakable Weak body part 10 knob 10 'slit 11 side heat seal 13 guillotine cutter 21 , 36 Tape-shaped film reel 43 Tape-shaped cover film film reel 44, 45 Punching press 53 Tape-shaped plastic chuck reel 62 Slider mounting machine 72 Vertical heat sealing machine 111, 112 Horizontal heat sealing machine 141 142 Pull-out roll driven intermittently H Length along the plastic chuck at the lower end of the cover film

Claims (10)

  A bag in which both ends of two plastic films are fused, and having a plastic chuck with a slider at the opening of the bag, the slider and the bag in the state where the plastic chuck is closed A cover film covers the upper end portion of the plastic chuck excluding the fusion portion located on the opposite side of the slider, and the two lower end portions of the cover film are below the engaging portion of the plastic chuck. The lower end of at least one of the cover films extends over the entire width of the bag, and the lower end of the cover film is a plastic film forming the bag and Overlaid on the flange portion of the plastic chuck, the plastic film, the cover film End, and the bag having a slider with plastic zipper by adding a tamper evident, characterized in that the three parties of the flange portion is fused.   2. The slider with an unauthorized opening prevention function according to claim 1, wherein a distance between the slider in the closed state of the plastic chuck and the end portion on the side of the cover film adjacent to the slider is 5 mm or less. A bag body with a plastic chuck attached.   The bag body having a plastic chuck with a slider with an unauthorized opening prevention function according to claim 2, wherein the top of the cover film is lower than the top of the slider in a state where the plastic chuck is closed.   The unauthorized opening prevention function according to any one of claims 1 to 3, wherein the cover film is provided with a perforation or a weak body portion for separation that extends in a width direction of the bag body. A bag having a plastic chuck with a slider.   The knob is provided in the said cover film in the vicinity of the melt | fusion part of the bag body located on the opposite side to the slider in the state in which the said plastic chuck was closed, The any one of Claims 1-4 characterized by the above-mentioned. A bag having a plastic chuck with a slider to which the function of preventing unauthorized opening described in 1. is added.   The said cover film is provided with the slit which consists of a perforation for a separation or a weak body part which reaches at least the said perforation for a separation or a weak body part from a top part, The any one of Claims 1-4 characterized by the above-mentioned. A bag having a plastic chuck with a slider to which the unauthorized opening prevention function described above is added. Supplying two continuous plastic films forming a bag;
Supplying to the two plastic films a continuous cover film film folded in half with a continuous plastic chuck and a slider mounting opening;
Sending the cover film film folded in half so as to straddle the plastic chuck;
A step of stacking the two plastic films, the plastic chuck and the cover film and fusing them in the supply direction;
A process of forming a fused part for both ends of a bag by fusing two fused plastic films, a plastic chuck and a film for a cover film at a width interval of the bag perpendicular to the supply direction. ,
Including the step of attaching a slider to the plastic chuck through the opening for attaching the slider of the film for the cover film, and the step of cutting the fused portion for both ends of the bag perpendicular to the supply direction. A method of manufacturing a bag having a plastic chuck with a slider to which an opening prevention function is added.   8. The function of preventing unauthorized opening according to claim 7, wherein a notch serving as an opening for slider mounting and an opening for both ends of the bag is formed during the supply of the film for cover film. For manufacturing a bag having a plastic chuck with a slider.   8. A cover film with a tamper-evident-preventing function according to claim 7, wherein a film for a cover film in which a notch serving as an opening for attaching the slider and an opening for both ends of the bag is formed is supplied. A method of manufacturing a bag having a plastic chuck.   The two plastic films, the plastic chuck, and the cover film film are fused in a state where a heat shielding plate is inserted between a pair of flanges of the plastic chuck. Item 8. A method for manufacturing a bag having a plastic chuck with a slider to which the unauthorized opening prevention function according to Item 7 is added.

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